Bolster for concrete structure.



J. J. LANKPOR'D. BOLSTEB FOR CONCRETE STRUCTURE.

Patented May 16,1911.

awumto z UNITED STATES PATENT OFFICE.

JEROME JAMES LANKFORD, OF GLOBE, ARIZONA TERRITORY, ASSIGNOR TO CLARENCE T. SEIPP, OF GLOBE, ARIZONA TERRITORY.

BOLSTER FOR CONCRETE STRUCTURE.

Specification of Letters Patent.

Application filed July 29, 1910. Serial No. 574,512.

To all whom it may concern:

Be it known that I, JEROME J. LANKFORD, a citizen of the United States, residing at Globe, in the county of Gila and Territory .of Arizona, have invented a new and useful Improvement Structures.

This invention relates to certain new and useful improvements in bolsters to be used in concrete steel construction, especially adapted to be used for supporting the reinforcing rods.

The object of my invention is to provide a device by which the reinforcing rods will be held a proper distance from the forms, and apart so that the rods will at all times be held in their proper positions in respect to the forms.

Another object of my invention is to provide a bolster which is so constructed that the rods will be held in such a manner that all danger of the bolster turning or moving in any way is prevented, the supporting member of the bolster being carried by L- shaped portions which hold the bolster so as to prevent the same from rocking or moving in any way.

A still further object of the invention is to i provide a bolster which will strengthen the completed structure when embedded therein to form the reinforcing rod support.

A still further object of the invention is to provide a bolster which is exceedingly simple and cheap in construction, and one which is preferably formed of a bar of galvanizediron so as to prevent the'same from rusting when embedded within the structure. With these various objects in view, my

- invention. consists of the novel features of construction, combination and arrangement of parts hereinafter fully described, pointed out in the claims and sfiovlvln in the accomanyin drawings,inw ic p Figu r e 1 is ahorizontal section through a beam showing the application of my improved bolster. Fig.2 is a section through the same. Fig. 3 is a perspective view of my improved bolster detached.

In the drawing A indicates my improved bolster, which comprises a central inverted U-shaped'supporting member, having a central depression forminga seat for the reinforcing rod, said supporting member having L-shaped members extending outwardly therefrom at its ends which support the in Bolsters for Concrete same in a vertical position so as to prevent the same from moving in any direction when the reinforcing rod is in position.

The bolster A is preferably formed of a bar of galvanized iron bent centrally to form the inverted U-shaped portion B, which is bent to form a socket or seat C, in which the reinforcing rod is adapted to be placed for holding the same in its proper position. The end portions of the wire extend outwardly at right angles, as shown at D, from the invertedU-shaped portion, and are then bent as shown at E so as to'extend parallel with the central U-shapedportion, and may be extended so as to form a similar bolster.

When the bolster is embedded within the mass of concrete, and the reinforcing rods placed in position, the bolster will hold the rods in their roper positions in respect to the forms, and in respect to each other when more than one rod is used, and can be used for supporting the reinforcing rods at any desirable point, and when used in a beam a series of bolsters are placed in the beam to receive the rodin order to prevent the same from moving in any way.

From the foregoing description it will be 158611, that I have provided a bolster for supporting the reinforcing rods in concrete structures of all kinds, which will not only hold the rods in their proper positions, but

will also be an element of strength to the structure.

- What I claim is:

1. A bolster for reinforcing rods comprising a bar bent centrally to form a supporting bar having angled ends and portions extending therefrom 'at right angles.

2. A bolster for a concrete steel structure comprising a bar of non-rusting metal bent centrally to form an' inverted U-shaped portion, having a central depression formin a seatto receive the reinforcin rods of llhe structure; the end portions 0 said bar being bent outwardly at right angles thereto and thenparallel with theinverted U shaped portion.

3. A bolster for supporting reinforcing rods in concrete steel construction comprising a bar bent'centrally to form an inverted U-shaped member, having a central depression forming a seat, adapted to receive the reinforcing rod of said structu're,'the end portions of said bar being bent outwardly seems at right angles theretoand then parallel therewith. v

4. As a new article of manufacture, a outwardly 1n opposite directions from said bolster adapted to be used in concrete steel supporting bars and then parallel therewith. 5 construction comprising a bar of non-rust- JEBQME JAMES LANKFORD.

receive cine reinforcing rod of said struciure,

ing' metal. bent to form an inverted U- "Witnesses: shafed supporting member having a cen- FRANK HAYNES, tra depression formed therein adapted to M. S. REID;

and the end portions of said bar being bent 10 

